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https://issues.apache.org/jira/browse/ARROW-2339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16437715#comment-16437715
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Antoine Pitrou commented on ARROW-2339:
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No, you need to scrupulously replicate Python hashing's mechanism.
Also I don't think there's any point in using xxHash and friends over a simple
64-bit integer.
> [Python] Add a fast path for int hashing
> ----------------------------------------
>
> Key: ARROW-2339
> URL: https://issues.apache.org/jira/browse/ARROW-2339
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Python
> Reporter: Alex Hagerman
> Assignee: Alex Hagerman
> Priority: Major
> Fix For: 0.10.0
>
>
> Create a __hash__ fast path for Int scalars that avoids using as_py().
>
> https://issues.apache.org/jira/browse/ARROW-640
> [https://github.com/apache/arrow/pull/1765/files/4497b69db8039cfeaa7a25f593f3a3e6c7984604]
>
>
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